The Suomen Osuuskauppojen Keskuskunta (SOK) Corporation, also known as the S Group, is a Finnish network of companies in the retail and service trades. A grouping of 22 regional and local cooperatives, the S Group has over 1.9 million members and 1,697 outlets, including four supermarket chains, service stations, hotels, restaurants and car dealerships, with an international reach into other Baltic countries and Russia. The S Group had sales in 2012 of 12 billion euros, up 5% from the previous year, and a market share of 45%.